Membrane Nitrogen Generator Module from Japan
Hollow fiber membrane modules separate nitrogen from air by allowing oxygen and other gases to permeate through semi-permeable membranes under pressure. Classified under HTS 8421.39.0140 for its specialized gas separation function in industrial inert gas supply.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide membrane permeability specs and N2 purity test results to confirm gas separation capability
• Label as 'industrial gas separation' to distinguish from consumer air purifiers
• Check for pressure vessel certifications (ASME/DOT) for safe customs clearance